topology.py 文件源码

def deploy_controller(self, sw, sw_to_ctrl_delays):
        sw_to_ctrl_delays[sw] = 0
        shortest_paths = nx.shortest_path(self.graph, target=sw, weight='delay')
        shortest_path_lengths = nx.shortest_path_length(self.graph, target=sw, weight='delay')
        log.info(shortest_paths)
        for n in self.graph.nodes():
            if n == sw:
                continue
            if n in shortest_path_lengths.keys():
                sw_to_ctrl_delays[n] = shortest_path_lengths[n]
            else:
                sw_to_ctrl_delays[n] = 1
        log.debug("sw to ctrl delays: %s" % str(sw_to_ctrl_delays))